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The Stroop matching task presents conflict at both the response and nonresponse levels: An event‐related potential and electromyography study
Author(s) -
Caldas A. L.,
MachadoPinheiro W.,
Souza L. B.,
MottaRibeiro G. C.,
David I. A.
Publication year - 2012
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.2012.01407.x
Subject(s) - stroop effect , psychology , task (project management) , matching (statistics) , event related potential , cognitive psychology , audiology , electromyography , electroencephalography , cognition , neuroscience , statistics , medicine , mathematics , management , economics
In the Stroop matching task, a Stroop word is compared to a colored bar. The origin of the conflict presented by this task is a topic of current debate. In an effort to disentangle nonresponse and response conflicts, we recorded electromyography ( EMG ) and event‐related potentials ( ERPs ) while participants performed the task. The N 450 component was sensitive to the relationship of color surfaces, regardless of the response, suggesting the participation of nonresponse conflict. Incompatible arrays (e.g., incongruent Stroop stimuli during “same” responses) presented a substantial amount of double EMG activation and slower EMG latencies, suggesting the participation of response conflict. We propose that both response and nonresponse conflicts are sources of these effects. The combined use of the EMG and ERP techniques played an important role in elucidating the conflicts immersed in the Stroop matching task.